diff --git a/src/org/jetbrains/eval4j/values.kt b/src/org/jetbrains/eval4j/values.kt
index 40acc520c37..db6617d286c 100644
--- a/src/org/jetbrains/eval4j/values.kt
+++ b/src/org/jetbrains/eval4j/values.kt
@@ -97,4 +97,11 @@ val Value.obj: Any?
             return v
         }
         return (this as AbstractValue<*>).value
-    }
\ No newline at end of file
+    }
+
+fun Any?.checkNull(): Any {
+    if (this == null) {
+        throw ThrownFromEvalException(ObjectValue(NullPointerException(), Type.getType(javaClass<NullPointerException>())))
+    }
+    return this
+}
\ No newline at end of file
diff --git a/test/org/jetbrains/eval4j/test/main.kt b/test/org/jetbrains/eval4j/test/main.kt
index 38d343a6fa0..65b4f0b3b62 100644
--- a/test/org/jetbrains/eval4j/test/main.kt
+++ b/test/org/jetbrains/eval4j/test/main.kt
@@ -225,13 +225,6 @@ object REFLECTION_EVAL : Eval {
         }
     }
 
-    fun Any?.checkNull(): Any {
-        if (this == null) {
-            throw ThrownFromEvalException(ObjectValue(NullPointerException(), Type.getType(javaClass<NullPointerException>())))
-        }
-        return this
-    }
-
     override fun getStaticField(fieldDesc: FieldDescription): Value {
         val field = findStaticField(fieldDesc)